电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
4期
139-144
,共6页
交流滤波器%电容器%不平衡保护
交流濾波器%電容器%不平衡保護
교류려파기%전용기%불평형보호
AC filter%capacitor%unbalance current protection
以南方电网各工程采用的交流滤波器C1电容器保护配合策略及运行情况为研究对象,对三种不平衡保护原理的优劣进行分析,指出当前计数法不平衡保护原理中存在的动作灵敏性、准确性的缺陷。综合比值法、桥差法和脉冲法的原理,提出了改进脉冲不平衡保护计数定值的建议,并首次提出了多段位计数的方法。基于一些特殊运行情况,提出了与桥差保护的配合思路。
以南方電網各工程採用的交流濾波器C1電容器保護配閤策略及運行情況為研究對象,對三種不平衡保護原理的優劣進行分析,指齣噹前計數法不平衡保護原理中存在的動作靈敏性、準確性的缺陷。綜閤比值法、橋差法和脈遲法的原理,提齣瞭改進脈遲不平衡保護計數定值的建議,併首次提齣瞭多段位計數的方法。基于一些特殊運行情況,提齣瞭與橋差保護的配閤思路。
이남방전망각공정채용적교류려파기C1전용기보호배합책략급운행정황위연구대상,대삼충불평형보호원리적우렬진행분석,지출당전계수법불평형보호원리중존재적동작령민성、준학성적결함。종합비치법、교차법화맥충법적원리,제출료개진맥충불평형보호계수정치적건의,병수차제출료다단위계수적방법。기우일사특수운행정황,제출료여교차보호적배합사로。
The coordination strategy and operation condition of the C1 capacitor protection of AC filter used in HVDC systems of CSG are analyzed. The advantages and disadvantages of the three unbalance protection principles are studied. The paper points out the defects in the sensitivity and reliability of the present unblanced protection principle using the counting method. Combining the ratio method, bridge differential method and pulse method, the paper proposes to improve the fixed value of pulse unbalance counting protection and first puts forward the multi-grade counting method. The coordination with the bridge differential protection is proposed based on the special operation status.